Coin detector



J. J. WILLIS COIN DETECTOR June 23, 1936.

Filed Oct. 1, 1935 ATTORNEY Patented June 23, 1936 Q l UNITED STATES PATENT OFFICE COIN DETECTOR John J. Willis, Comstock, N. Y., assignor of one-'- fifth to Mary Willis, Comstock, N. Y.

Application October 1, 1935, Serial No. 43,102 1 Claim. (01. 73-51) The invention relates to a coin detector and has body I! is countersunk in the slab Ill and occupies for its primary object to provide a device of this the seat ll therein. kind, wherein spurious coins can be readily and Covering the open top of the body I2 is a easily detected, the device being mountable in slotted plate I4, it having end ears l5 through 5 a cash register or in a cashiers counter or other which are passed fasteners l6 for detachably place for its support so as to be handy for use in securing the said plate in place and through the testing coins to ascertain whether or not the slot I! in this plate'is adapted to be introduced a same are spurious or counterfeit. coin for contact of the contents l3 or solution Another object of the invention is to provide a therewith as contained within the said body I! device of this kind, wherein a testing fluid can and in this manner the coin can be tested to 10 be held so that when a coin is subjected thereto detect whether or not the same is spurious or it will determine whether or not the same is made from precious metal or silver species of spurious or legitimate, that is silver species, and metal. The slot I1 is of a size to accommodate is convenient for use. the largest coin, that is of the dollar denomina- A further object of the invention is the protion, while coins of the five cent, ten cent,twentyl5 vision of a device of this kind, which is exfive cent and fifty cent species or denominations tremely simple in construction, thoroughly relican be readily inserted through the slot for the able and efficient in its purpose, and inexpensive testing thereof. 7 to manufacture and install. Pressed into the slot l I is a closure bar i8 With these and other objects in view, the inhaving the offset ends l9 beneath the plate I4 20 vention consists in the features of construction, beyond the slot l1 and these ends ride coiled combination and arrangement of parts as will be compression springs 20 which are hooked to cross hereinafter more fully described, illustrated in arms 2| formed on the said ends of the bar, the the accompanying drawing, which discloses the springs being also hooked to and rise from cross preferred embodiment of the invention and pieces 22 resting upon the bottom of the body I2 25 pointed out in the claim hereunto appended. interiorly of the same. In the accompanying drawing: What is claimed is: Figure 1 is a fragmentary vertical sectional A device of thecharacter described comprising view through a cash register showing the device an elongated body open at its top and adapted o0 constructed in accordance with the invention for fitting within a support to have its open top fitted therewith. flush with an exposed surface of said support, a Figure 2 is a fragmentary top plan view. cover overlying the open top of said body and Figure 3 is an enlarged sectional view on the having a slot for accommodating coins, a testing line 33 of Figure 1 looking in the direction of solution within the body and accessible through the arrows. the open slot, a bar having an upstruck portion 35 Similar reference characters indicate correof a size corresponding to the slot for reception spending parts throughout the several views in therein, cross pieces at opposite ends of the bar the drawing. and of a length'substantially equal to the in- Referring to the drawing in detail, A desigterior width of said body, rest bars parallel with 40 nates generally a portion of a cash register and said cross pieces spaced beneath the same and of 40 I0 its top rest slab preferably of glass or marble. a length equal thereto, expansible springs fitted This slab has a seat I l formed therein to accomwith the cross pieces and said rest bars for urging modate an elongated substantially rectangular the first-mentioned bar to have the upstruck shaped box-like body l2 forming a well for conportion seated within said slot, and fastener ears taining a testing fluid or solution I 3, the formula at opposite ends of the cover and detachably for the solution being fifteen drops of nitric acid, secured with the support. twenty-four grains of nitrate of silver and a JOHN J. WILLIS. determined quantity of distilled water. The 

